Apparatus for separating the riser from alpha stereotype plate



Oct. 11, 1932. H. c. JORDHOY APPARATUS FOR SEPARATING THE RISER FROM A STEREOTYPE PLATE i al i e y 1 1926 3 Sheets-Sheet 1 Zak-m Oct. 11, 1932. H. c. JORDHOY APPARATUS FOR SEPARATING THE RISER FROM A STEREOTYPE PLATE Original Filed May 12, 1926 3 Sheets-Sheet 2 Oct. 11, 1932. c, JORDHQY 1,881,647

APPARATUS FOR SEPARATING THE RISER FROM A STEREOTYPE PLATE Original Filed May 12, 1926 3 Sheets-Sheet 3 Cit Patented Oct. 11, .1932

- 1 UNITED STATES PATENT OFFICE HANS G. JORDHOY, OF NORTH PLAIN FIELD, NEW JERSEY, ASSIGNOR T WOOD NEWS- PAPER, MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA it 1 1 APPARATUS ron SEPARATING THE RISER FROM A STEREOTYPE PLATE Application and May 12, 1926, Serial No. 108,632. Renewed September 11, 1930.

The principal" objects of the invention are to provide for separating the riser from the plate withoutnecessitating the use of any trimming saws or any other cutting devices, thus eliminating aconsiderable proportion of the mechanism of a stereotype plate casting machine; to provide for separating the Y tail by a breaking action and in such a way Y that the exact line along which the break occurs will be determined and will be located at the edge of the printing area of the plate so that it will not leave an edge irregular enough to require finishing; to provide a shape of gate and relationship between it and the mold itself of such anature that the casting will have a thin zone along the line at which the riser is to be separated to insure the breaking of the riser off along a plane at that point ;to provide for causing the necessary movements of the gate relative to the mold to take placeabout an axis in line with the matrix so'that this action will not disturb the relation between the matrix and other parts or have any tendency to break the matrix even if the same one'is used over and over; to provide for discharging the riser in a very simple manner; and to provide mechanism for accomplishing these results which will be of comparatively simple construction and much less expensive than the cutting and trimming apparatus that is displaced by it.

Other objects and advantages of the invention will appear'hereinafte'r. Y

Reference is to be had to the accompanying drawings in which Fig. 1 is a front View of theend of a mold with the gate and operating mechanism for detaching the riser in accordance with this invention; I Fig. 2 is a sectional view of the mold and risershowing the operating parts with the mold infthe position in which the plate is cast;

Fig. 3 is a similar view showing the parts inthe position they assume after the'riser is separated; I Fig. 4 is a viewsimilar to Fig. 3 showing the position of the parts for delivering the riser;

Fig. 5 is an enlarged view of the parts in the position shown in Fig. 3 showing in detail how the riser is separated;

gig. 6 is an end view of the operating gear; an

Fig. 7 is a similar View of a cam on the same shaft, the construction of which will be described later.

It has been customary heretofore, to remove the riser from a cast stereotype plate by sawing it off. This always involves considerable machinery. The saw not onlyhas to be rotated on its own axis, but it has to be moved along the plate while rotating. Other methodsare even more expensive.

According to this invention, this machinery is all eliminated and its difficulties avoided by simply breaking the riser from the plate. This can be done with several changes in'the ordinarygates because, obviously, it would not be useful to break the riser off if it were'broken with such a ragged surface as to require finishing afterwards. Therefore I have provided several of the steps and means abovementioned for securing theresult of breaking off the riser at exactly the desired point and along a plane not projecting beyond the plate. I do this in such a way as to leave an edge without any long projections extending from it and at the same time avoid the chance of injuring the matrix.

I locate the back 10 of the mold on a frame 11. The core 17 of the mold is constructed as usual and the parts are assembled in the usual way with the matrix M for receiving the metal in the position shown in Fig. 2.

,The frame has a portion 12 on each side provided with a slot 13 which is-of semi-circular shape at its rear wall and having horizontal top and bottom surfaces. These slots are formed as open sided bearings.

The axis of these bearings is located substantially in the plane of a tangent to the matrix M and very close to the edge of the mold. Preferably it is at the intersection of thesev two planes. In the two bearings or sockets 13 are located atopposite sides of the machine, two pivoted studs 14. These studs project from the outer gate 15 in alignment with each other; The inner gate '16 is pivoted on the outer gate at the axis of these two studs. The gates overlap at their edges to hold the metal.

The-gate sections are formed so that the metal will flow along a gently curved surface 18 onthe outer gate directly into, the-mold. It does not encounter any sudden change in direction or anyirregularities in the mold surface that would interfere with the gentle fl'o'w'of the metal. The inner gate 16 is'provided with a projection 19 which extends over the matriX'M and whenthe mold is closed holds it back in pos tion against a matnx leven'therefore, constitutes a bell crank for 1 v by comparison ofthe drawings. This rack bar 20. This projection 19 extends out part way across the width of the mold cavity just at-the'edge of the .plate P. It is provided for the purpose of causing these'ction of the metal, just at this point to'be reduced in thickness. Furthermore the bottom edge of theproj ec tic-n '19- is 'radial and'in alignment" with the plane of the'dfesired break across the edge of the cast plate. Therefore the casting is broken along this line as indicated in Fig.

5,"and the'e'd ge is brok'e n off in'alignment with the flat surface on the bottom of the projection I18 whichis sufficient to start the break in that direction. broken surface is comparatively smallso that no great irregularities can occur. The man nor of causing the" break will be described after the details of the machinery are set forth.-

"On theframe thereiis a hand operating lever 21 pivoted on a: stud22, said-lever being provided with anotherarm which is"pivoted' to" the bottom of vavertical rack 23. This raising and lowering the rack as will be seen meshes with segment'gear 24:; fixed on a shaft 25.' "Therefore this shaft will beos'cil 25. As stated the outer gate is pivoted by the studs 14- in the sockets 13. The axesfi of these sockets and studs areboth substanti ally in the plane of the edge fof the matrix and in theplane of the end of the projection 11.911 Thefirst motion of the operating handle in. raising therack. 23 will cause the two gates 15 andr16' to swing from the closed position indicated in Fig. 2 to the open position indt c'a'ted inFigs. 3jand '5 about said axis. This results in separating the riser R from the plate by fracturing the castingalong the connecting, plane whichis radialas indicated clearly in 5. It will be seen that the The width of the fracture is substantially ina plane which extends across the extreme end of the plate P where the projection 19 engages the bolster of the matrix ""Now the further movement of the lever 21 will move the gates positively upwardly with .the cams 26 as the studs 28 are nowat the bottom of the slots 27. This" motion about thevshaft draws'the'pivotedstuds1i out of the'sockets 13. As the two gatesmove upwardly, the inner gate is free to swing down against theshaft 25 thus separating these gates at 'what'was their upper'end. The riser 1% will be free to slide out frombetweenthem as indicated at Fig. 4. This is brought about by the fact that the gate 15- i's provided atits end with theYtWO flangesBO each having an open ended: slot 31. These slotsxareadapted to receive the shaf't 25 when: the parts are rocked: over from. the position shown in Fig. 3

to that shown in'Fig; 4. In Fig. 2 the shaft i 25 is thisslot so that the position of the gates is controlled vertically, but the rotation of the shaft 25- and the cam 26-from the position. shown in Fig. 2 to theposition shown in Fig. 3 brings the slots 31 inwardly so that the, shaft 25 is located'in the bottom thereof. Now,however,the further motion of the shaft inithe same direction necessarily results in swinging the gates upwardly, with the in ner gate resting on the shaft by flanges andtheir slots. In. the positionshown in Fig. 1 a projection 33 on the shaft 25 is brought into'conmeans of the tact with the inner; gate 16 to hold it in cast- M ingposition, but upon-the starting of the motion of the shaft 25, this projection swings upwardly. as shown in Fig. 3 and finally downwardly as shownin Fig. 4, out of active position. The back core, and gates are provided with water passages and connected so that cold water can-be circulated in them'to chill the castyeryquickly.

' e, The operation is very simple. Assume the parts to be in thepos'ition shown in Fig. 2 with. the metal plate cast. After chilling the first thing accomplished is the breaking of the tail or riserffrom'thecast plate. As the operating lever 21 is swung backwardly from the full line positionin Fig. 2, the shaft 25 is turned. so] that the stud 28 is pulledtoward the center by the cam 271111131111116 parts come to the position'shown in Fig. 3.: The result of this action is to swing the two gates on the pivoted studs ll with a very strong leverage to the position shown in Fig. 3 and Fig. 5. A

The metal in theriser is thus moved bodily a little sideways and broken apart from the metal in the plate. 'lhis'turning on the shaft also swings the projections or rests 33 from contact with the inner gate as shown in Fig. 3. 3 The 7 continued motion of the operating lever inthe same direction has the effect of taking the studs 28 with the cams 26 because these studs are now atthebottoms of the cam slots. This necessarily" carries the whole ree gate structure upwardly and around with the shaft 25 until it reaches the position shown in Fig. 4:. Toward the end of the motion the gates are opened, that is separated from each other about their common pivot studs 14, leaving aspace for the riser R which will drop out by gravity as indicated in F ig..4c. I

By thistime the core 17 has been turned around so as to deliver the cast'plate by means not shown herein, but common. in this art. The movement of the gates out of the way permits this action to take place without the plate engaging the gates. Now the core 17 being returned to casting position, the operating lever'21 can be turned back to swing the gates down through the position in Fig. 3 to that shown in Fig. 2. Then the parts are ready for the introduction of metal between the gates for the casting of a new'plate. As the gates swing down into casting position the projections-33 pressagainst the back of the inner gate to hold the gates firmly in casting position sojthat the metal can not leak past the lower edge.

This construction and operation eliminates.

the sawsor other cutting devices that are used ordinarily for trimming'olf the riser andpermits of removing it in the most expeditlous manner, without leaving any materially rough edge in a position where it has to be trimmed oii' afterwards. The gates are in the proper place during the casting operation and they are held tightly against the casting box and core. The riser is disposed of with i hardly any additional motion on the part of the operator and the plateis removed ready for shaving, if that is required.

No claim is'made herein to the method set forth, as that was presented in my divisional application filed Dec. 9, 1929, Serial No.

'ited in these respects but what I do claim is 1. In a device for casting stereotype printing plates, the combination with a mold having a matrix therein, of agate having a proje'cting portion extending over the mold cavity in a transverse direction at the edge of the core thereby providing a thin section I of metal at the bottom of the riser to facilitate the breaking ofi of'the riser at the edge of the plate.

2. The combination with a mold, ofa gate pivoted on an axis located in a plane of one surface of the mold, the gate having a. proof the riser from the plate is facilitated by the thin area thus produced in the casting.

3. The c'ombinationwith a mold, of a gate for directing the metal thereto pivoted on an axis in the plane of the edge of the mold at which the gate is located, whereby said gate can be swung on said axis away from the mold and with it the riserto breakthe riser in the gate from the casting.

4. A gate for directing the metal to a mold pivot-ally mounted on an axis in the plane of thematrix of.v the mold whereby said gate with the riser can be swung on said axis away from the matrix to break the riser in the gate from the casting. 5. In a device for producing a stereotype printing plate, the combination of a gate, and means for movably supporting the gate so that it can be moved to break theriser from the plate.

6. In a stereotype printing plate casting device, the combination 01" a gate having a projection for holding the bolster of the matrix, said projection extending over the moldcavity in a radial direction at the edge of the mold cavity, and means for moving the gate to break-the riser from the cast plate along the radial plane. r I 7. In a stereotype-printing plate casting device, the combination with a matrix, of a gate having a projection extending'over the mold cavity for holding the bolster of the matrix, and means for moving the gate to break the riser from the cast plate.

8. In a device for casting stereotype printing Plates, the combination with a mold having a matrix therein, of a gate having two parts, one registering with one side of the mold cavity and the other projecting in above the mold space from the other side of the mold cavity and from the matrix, to provide a thin section of metal at the bottom of the riser to facilitate the breaking oil? of the riser at the edge of the plate, and means for swinging'the gate bodily in a direction away from the matrix and away from the cast plate to break the riser from the plate at the thin place.

9. In a device for casting stereotype printing plates, the combination with a mold having a matrix therein, of a gate having two parts, one projecting in above the mold space from the matrix, to provide a thin section of metal. at the bottom of the riser, and means for swinging the gate bodily in a direction away from the matrix and awayrfrom the 7 cast plate to break the riser from the plate.

10.. The combination with a mold for easting a stereotype printing plate adapted to hold the matrix therein, of a gate for directing themetal to the mold, said gate comprisfront. and back parts, one of them having pivot studs alignment for supporting the gate to swing, said pivot studs being located with their axis substantially in the plane of 7 1 ing located with their. axis substantially in the radial plane of'the' edge of the mold. I

12. The combination with a mold for easting avcurved stereotype printing plate, of a gate for directing the metal thereto,pivotally mounted on. an axis in the plane'of the matrix of the mold and means for swinging thegate in its entirety with the riser about'its axis to break the'riserin the gate from the casting,

13. The combination with a mold for easta curvedstereotype printing plate, of a gate for directing the metal thereto, comprisingv'tw'o parts p-ivotally connected together on an axis in the plane of the edge of the mold'at which the gate islocated, and means for swinging the-gate'in its; entirety with the riser about its axis to breaklthe riser. in the gate from the casting.

14, The combinationwith a mold for easting a stereotype printing plateadapted to hold. the matrix therein, of a gate for directmg the metal to the mold having pivot studs in alignment for supporting the gate, said pivot studs being located withltheir axis substantially in theplane of the bolster of, the

matrix, whereby, when the gate is swung on its pivot studs, it will break the riser therein from the casting in a region away from the matrix to avoid injury thereto and produce a plate with a fractured edge which will not needfinishing. y

15. The'combination with a mold for easting a stereotype printing plate adapted to i hold the matrix therein, of a gate for directing the metal to the mold, said gate compris ing front andlback parts connected: together and having pivot studsin alignmentzfor supporting the gate, said pivot studs being locat-- ed with their axis substantially in the plane of the bolsterof' the matrix, and means for a curved stereotype'printingplate adapted to hold the matrixtherein, of a gate for directing the metal to the mold, having pivot studs for supporting it located with'their axis at the side of the. mold, the gate having a projection within "itself but-with its edge mitrelease of the riser therefrom;

eaner:

located radially of the' moldifor starting a fracture in the plate along the radial plane.

317 The combination with 'a mold for casting a stereotype printing vplate adapted to hold'the matrix'therein, of. agate for directing" the metal to the mold, said gate; having pivot studs for supporting itlocated with their axis substantially in; the :plane of I the bolster of the-matrix, the gate'havlng a projection within itself but'with its edge located radially of the mold for starting a fracture of the mold,v one section of the gate having a-fprojection extending T as; far "as the mold proper and having'a surface transverseto the mold and in alignment w th said cavity,

whereby the. section of the riserg'just above the mold cavity is reduced and the separation of the riser from the platelis facilitated by the thin sectionthus produced-in the casting, means for moving the gate tofracturethe casting at the thin section, and means for separating the-two parts of the gate to per-- -19. In a casting device, the combination with a casting mold, of a gate therefor, a frame on which said gate is pivoted atits deliveryend,ashaft, a rack pinion and operating handle 'foros'cillating the shaft," a cam onthe shaft having a cam slot, the cam slot being located and arranged so that when the shaft is turned'a short distance the cam will move with respect to the' stud and pull the stud inwardly towards the shaft for changing the position of the" gate and breakingthe riser from'th'e casting and the fur 20. In a castin devicefthe combination with a casting mold, of, ai gate therefor comprising two parts, a frame on which said gate is pivoted at its delivery e'nd,'a shaft,

means for operating the shaft comprising a handle, rack and pinionymeans on the shaft whereby, when the shaft is turned a short distance, the gate will move with respect to the mold to break the riser from the casting and when the shaft passes through a further rotation the gate will move with it bodily to a position in whichrthe gate is reversed and the casting can' be dischargedby sliding down. theinside surface of the gate.

21. The combinationwith a mold,of a gate pivoted at the bottom, and means for swinging said gate about the pivot to break the riser from the casting and for there-after swinging the gate upwardly away from the casting into a position to leave the riser on a Y slanting surface within the gate to permit it to slide therefrom by gravity.

22. The combination with a mold, of a gate .pivoted to swing on an axis at the bottom of the gate for breakin the riser from the casting, and means for rst swinging the gate to break theriser off and then moving the gate charge of the riser from the gate by gravity. 23; The combination with a mold, of a gate comprising two parts pivoted together at the bottom of the gate, and means for swinging said riser as a whole about said pivot to break the riser from the casting and for thereafter, by a. continuous motion, swinging the gate upwardly away from the casting and separating the parts on their pivots and leave it in a position to let the riser slide down a slanting surface of the gate. 1

24. The combination with a mold, of a riser in twoparts pivoted to swing on an axis at the bottom of the gate for breaking the riser from the casting, and means for first swinging the gate to break the riser off 7 and then moving the gate upwardly, reversing it, and swinging the two parts apart to permit the discharge of the riser from the v gate.

25. The combination with a mold, of a gate therefor pivotally mounted at the bottom, a shaft having a cam thereon provided with a cam slot, a stud connected with the gate and entering said cam slot, said parts being so related that the rotation of said shaft will first swing the cam so as to move the stud from one end of it to the other and swing the gate to detach the riser from the casting and the continued rotation of the shaft in the same direction will then move the gate bodily upwardly by reason of the stud engaging the end of the slot.

26. In a casting device, the combination with a casting mold, of a riser therefor having a stud, a frame on which said riser is pivoted at its delivery end, a shaft, a cam on the shaft having an eccentric cam slot for receiving the stud, the cam slot being located sliding down the inside surface of the gate.

' 27. In a casting device, the combination with a mold, of a gate for delivering metal thereto, said gate comprising two parts pivotally connected and being pivotally mounted, an operating shaft, a cam on the operat ing shaft having an eccentrically arranged slot, a stud on the gate entering the slot and linovable bythe cam inwardly to change the position of the gate as the stud moves toward the end of the slot andthen movable bodily position being adapted to swing downwardly from the other part of the gate. upwardly and reversing it to permit the d1s- 28. In a casting device, the combination with a mold, of a gate for deliveringmetal thereto, said gate being pivotally mounted,

an operating shaft, and means on the operatsaid riser is pivoted at its delivery end, a.

shaft, and means on the shaft for swinging the gate as a whole to break the riser from the casting and then carrying the gate with it bodily to a position in which the gate is reversed, said means holding the upper part of the gate up, and the lower half being capable of swinging down to separate therefrom so that the casting can be discharged from the gate.

30. In a casting device, the combination with a mold, of a gate for delivering metal thereto, said gate comprising two parts pivotally connected together near the bottom and one part having pivot studs projecting therefrom, a frame having open sided bearings for pivotally supporting said studs and gate, an operating shaft, a cam on the operating shaft having a cam slot, a stud on the gate entering the slot whereby the gate can be tilted on its pivot studs by the cam, said cam slot ending at such a point that the continued rotation of the cam will swing the gate by said stud about the shaft and bring the j pair of studs out of theirbearings, and means on the gate for connecting it with the shaft to be supported thereby.

81. In a casting device, the combination with a gate for delivering metal to a mold, said gate comprising two parts pivotally connected together near the bottom and one part having projecting pivot studs on which the entire gate is pivotally mounted, an operating shaft, a cam on the operating shaft having means for swinging the gate on its pivot studs and then moving the gate bodily about the shaft, the part of the gate having the studs also having slotted projections for centering and holding it on the shaft, the lower part of the gate in its reversed position being adapted to swing downwardly from the studded gate part to release the riser therein.

32. The combination with casting mold and its pouring gate, of means for causing a relative lateral motion between the gate :ahd mold, after, the casting-is made, tdbreak ,l, "ofithe sprue. 1 33. The combination with a stereotype plate-mold and its pouring gate of means for shifting the gate,,a;fter casting, to vfracture the sprue. I e 1 V 34. Theecombinati on with a curved stereo- ;type plate mold of a pouring gate therefor movable from" the side edge of the mold inwardlyto break the-Spine off the casting.

e Intestimohy whereof I havehereunto afyfiXedImysigna-ture, 1'

' HANS CJJORDI-IOY. 

